Pulley-crowning attachment for lathes.



No. 322,754. PATENTED JUNE 5, 1906.

H. MoLEOD. PULLEY OROWNING ATTACHMENT FOR LATHES.

I APPLICATION PILEDSEPT. 3, 1904.

noon McLEGD, or HATFIELD, MASSAonu-sarrS."

PULLEY-CROWNING ATTACHMENT FOR LATHE$= Specification of Letters Patent.

Patented June 5, 1906.

Application filed Sleptember 3,1904. Serial No. 223,211.

To all whom it may concern:

Be it known that I, HUGH MCLEOD, a citi-' cheaply than can be done with the devices now in use within my knowledge, a further object being to rovide a construction for the above-describe use capable of being adjusted to crown the face of ulleys whose diameters are different and wli oi different widths.

Having these ends in view, the invention consists in the construction set forth in the followin specification and clearly summarized in t e claims a pended thereto.

' In the drawings 'orming part of this application, Figure 1 is a plan view of a tool-car riage of a athe having the invention applied thereto. Fig. '2 is' a perspective view of a portion 01 an oscillating arm mounted on the tool-carriage.

Fi 3 is a perspective view of an eccentrica'ly-located ring loosely mounted in a socket in said oscillating arm.

' Fig. 4 is a pers ective view of one end of anarm connecte with said ring and withthe cross-slide on the tool-carriage. Fig. 5 is a partly-sectional view of the principal operative arts of the device on line 5 5, Fig. 1.

Re erring to the drawings, a indicates the tool-carriage of a lathe, and b the ways on the lathe-bed on which the carriage slides, the

latter being moved in the usual manner by a.

suitable feed-screw, as c. Mounted, on this tool-carriage and transversely slidable there on in the ways (i is the usual cross-slide e, carrying the tool- 0st f, the cross-slide being operable by hand fw as g, and the tool-carriage operable in the usual manner longitudinally ofthe bed by means of the hand-wheel h, all; as usual in lathes. Means are provided also common in lathe constructions whereby the cross' slide ma be disengaged from the feed-screw operate by the hand-wheel g, (which means are not shown herein;) but by means 'of such disengagement, as is well-known, the crossslide may be moved back and forth on the Ways d independently of its feed-screw.

osefaces are I y meansof a crank-wheel,

In carrying out this invention means are provided whereby the tool-carriage and the cross-slide may be manipulated by their feed-screws in the usual manner to adjust the tool properly relative to the face of the pulley, a portion of which is indicated by m and the device forming the subject-matter of this application, connected with the crossslide, is actuated by the feed movement of the tool-carriage a to automatically 'move the cross-slide in one direction during the traverse movement of the tool f from one side of the pulley to the center thereof and in the opposite direction during the traverse movement of the tool from the center to the other side. This movement of the slidebe'ing continuous, or practically so, the path described by the point of the tool will be that of a curve such as is shown by the dotted linelc, Fig. l.

parted to the cross-slide 6 consists of a block 0 transversely slidable on the ways'd of the tool-carriage, the same as the cross-slide, except that it has no feed-sc.rew. T his block has mounted on the upper side thereof the disk p, in the under sideof which. a socket q is turned to receive a rotatable member 1', which is located eccentric to the axis of the disk 10. This axis is indicated by the hole 8, through which a screw 6 passes and is screwed into the block 0. In the rotatable member 7" a pin 12 is fixed, which engages with ahole w in the end of a hart 3, which extends between the disk -and the cross-slide said bar being attac ed to the cross-slide pivotally by a nut, as y, the end of the bar under the disk being let into a recess in the edge of the block 0, as shown in Fig. 5.

- Extending rearwardly from the back side of the disk p is an arm 3, provided with a number of holes 4 therein, whereby by means of a pin 6 a connecting-rod 7 may be end of the brace-rod being pivotally secured, as at 8, to the bed'of the machine, the point of attachment of said bar 7 being preferably in the form of a post 9, as shown, projected up from the plan view, Fig. 1.

0 is moved on the ways (i to permit the attachment of the bar'w to the cross-slide e, the arm 3 being in the position shown. in Fig; 1, and the pin 1; will then lie'in a line extending centrally through the disk 1), lengthwise through the arm 3, and through the tool j, and the block is then secured to the carriage When the parts are put together, the block,

The device whereby this movement is imsecured pivotally to the arm 3, the opposite by bolts By means of the hand-wheels g Y cupy the and h the tool may now be moved to a position indicated by dotted lines in Fig. 1 at the right-hand end of the work, the cross-slide released from its feed-screw, and the automatic feed set to 0 erate the tool-carriage lengthwise of the be As the tool moves to the right the brace-rod 7 will prevent the arm 3 from moving with it, and hence when the tool-arrives at the position shown at the right-hand side of the work the arm 3 will ocosition shown in dotted lines in Fig. 1, an in moving to this position the disk 1) will have been rotated'and the pin 12 on the rotatable member 1', acting as a crank-pin, will have drawn the cross-slide toward it by means of the bar at, extending between said pin 4) and the cross-slide. Of course during the movement of the tool-carriage toward the ri ht, as described, the tool must be backed'oif away from work, then advanced to the proper position, andv then released from its feed-screw. When the tool-carriage now moves to the left, it is obvious that the tool will be backed off from the work grad-o ually by the rotation of'the disk 29 until the arm 3 reaches the position shown 1n full lines in Fig. 1, the continued movement of the tool-carriage eflecting the continued rotation of the disk whereby after passing the cen ter the too will again. be drawn in toward the work, thereb giving to the face of the pulley the desire crown.

- The bar as may be provided with a number of holes for the reception of the bolt 7 thereby adapting the device to be used on pulle s o varying diameters, and by changing t 1e point of connection between the brace-bar 7V and the arm 3 moreor less crow-n may be formed on the face of the pulley, or the device may be adapted to pulleys having the same diameter and different width of face. It is thus seen that by means of these adjustments the device is applicable to a great variety of Work, whereas when the crowns are turned on the pulleys as at present by means of a pilot-slot it requires a separate block having one of these pilot-slots therein for each pulley to be turned in, which the crown varies.

Having thus described my invention, what I claim, and desire to secure by Letters Pat-- bar connected to the pin at one end and ivotally to the cross-slide at the other en as described. j

2. The combination with the tool-carriage of a lathe, of a cross-slide thereon, a disk rotatably mounted on the carriage, a rotatable member located in a socket in said disk eccentrically thereto, a pin located in said rotatable member e ccentrically of the latter, a connection extending from said pin to the crossslide and pivotally connected with the latter, an arm rigidly connected to the disk, and a brace-rod adjustably secured to said arm by one end, its opposite end being fixed.

HUGH 'MGLEOD. Witnesses A. E. Anois,

Aacnna C. VINING. 

